| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [art] [noun] | 407 |
|
| 2 | could [verb] [art] lot | 102 |
|
| 3 | could [vb infin] [art] lot | 101 |
|
| 4 | [modal v] have [art] lot | 96 |
|
| 5 | could have [art] lot | 7 |
|
